Engaging - Feel like a natural app
on the device, with an immersive user experience.

This new level of quality allows Progressive Web Apps to earn a
place on the user's home screen.

Reliable

When launched from the user’s home screen, service workers enable a
Progressive Web App to load instantly, regardless of the network
state.

A service worker, written in JavaScript, is like a client-side proxy
and puts you in control of the cache and how to respond to resource
requests. By pre-caching key resources you can eliminate the
dependence on the network, ensuring an instant and reliable
experience for your users.

Fast

Engaging

Progressive Web Apps are installable and live on the user's
home screen, without the need for an app store. They
offer an immersive full screen experience with help from a
web app manifest file and can even re-engage users with web
push notifications.

The Web App Manifest allows you to control how your app appears and
how it's launched. You can specify home screen icons, the page to load
when the app is launched, screen orientation, and even whether or not
to show the browser chrome.

Increased engagement
Web push notifications helped eXtra Electronics increase
engagement by 4X. And those users spend twice as much time on
the site.

Improved conversions
The ability to deliver an amazing user experience helped AliExpress
improve conversions for new users across all browsers by 104%
and on iOS by 82%.

Lighthouse

Lighthouse, an open-source, automated tool for improving the quality of your Progressive Web Apps, eliminates much of the manual testing that was previously required. You can even use Lighthouse in continuous integration systems to catch regressions.